British Rail Class 11

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British Rail Class 11
Power type Diesel-electric
Builder LMS/BR Derby & BR Darlington
Build date 1945–1952
Total production 120
Configuration 0-6-0
UIC classification C
Gauge ft 8+12 in (1,435 mmstandard gauge
Wheel diameter 4 ft 0 12 in (1.232 m)
Minimum curve 3.5 chains (70 m)
Wheelbase 11 ft 6 in (3.51 m)
Length 29 ft 1 12 in (8.88 m)
Width 8 ft 5 in (2.57 m)
Height 12 ft 5 12 in (3.80 m)
Locomotive weight 47.4 long tons (48.2 t)
Fuel capacity 660 imp gal (3,000 l; 790 US gal)
Prime mover English Electric 6KT
Generator English Electric 801 — 441 A, 430 V
Traction motors English Electric 506, 2 off
Cylinders Straight 6
Transmission DC generator, DC traction motors, double reduction gearing
Multiple working Not fitted
Top speed 20 mph (32 km/h)
Power output Engine: 350 hp (261 kW)
Tractive effort Maximum: 34,900 lbf (155.2 kN)
Train heating None
Locomotive brakeforce 32.2 long tons-force (321 kN)
Train brakes Vacuum
Career War Department
Nederlandse Spoorwegen (NS)
London, Midland and Scottish Railway
British Railways
HNRC
heritage railways
Number in class WD: 14 (10 to NS)
LMS/BR: 106
Number WD: 70260–70273
LMS: 7120–7129
BR: 12033–12138
Axle load class RA 5

The British Rail Class 11 is diesel shunting locomotive built from April 1945 to December 1952. They are based on a similar earlier batch built by the London, Midland and Scottish Railway (LMS) between 1939 and 1942.